security/sssd2: fix detection of krb5

Because security/krb5 has bumped version, it is not well detected
and make this port on packaging.

This adds a patch to update the detection of krb 1.22 that is not
on the original sources.

PR: 288708
Approved by: 0mp (mentor)
Approved by: kevans
Approved by: portmgr blanket (build fix)
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D51813